[jira] [Commented] (COMPRESS-117) Certain tar files not recognised by ArchiveStreamFactory

["Sebb (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COMPRESS-117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13010093#comment-13010093 ] 

Sebb commented on COMPRESS-117:
-------------------------------

One possible approach would be to check if the first entry parses OK, and if so, assume that it is a tar file.

This should be done in ArchiveStreamFactory, not TarArchiveInputStream.matches(), because matches() is a signature check only.

> Certain tar files not recognised by ArchiveStreamFactory
> --------------------------------------------------------
>
>                 Key: COMPRESS-117
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-117
>             Project: Commons Compress
>          Issue Type: Bug
>          Components: Archivers
>    Affects Versions: 1.1
>         Environment: MS Windows Vista, NetBeans IDE
>            Reporter: Leo Izen
>            Priority: Minor
>         Attachments: lzma912.tar
>
>
> Certain tar files, like this one: http://leo.scruffohio.net/cgi-bin/uploads/lzma912.tar aren't being recognized by the ArchiveInputStream detector.
> I can open this tar file perfectly well with WinRAR and 7-zip. Neither of these complain. I can also open it with the command tar -xvf. However, I narrowed it down, and it turns out the TarArchiveInputStream.matches() is returning false, even though it is a valid tar file. This glitch should be fixed.

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